Enum aws_sdk_mediaconnect::types::FailoverMode
source · #[non_exhaustive]pub enum FailoverMode {
Failover,
Merge,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against FailoverMode
, it is important to ensure
your code is forward-compatible. That is, if a match arm handles a case for a
feature that is supported by the service but has not been represented as an enum
variant in a current version of SDK, your code should continue to work when you
upgrade SDK to a future version in which the enum does include a variant for that
feature.
Here is an example of how you can make a match expression forward-compatible:
# let failovermode = unimplemented!();
match failovermode {
FailoverMode::Failover => { /* ... */ },
FailoverMode::Merge => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when failovermode
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant FailoverMode::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
FailoverMode::Unknown(UnknownVariantValue("NewFeature".to_owned()))
and calling as_str
on it yields "NewFeature"
.
This match expression is forward-compatible when executed with a newer
version of SDK where the variant FailoverMode::NewFeature
is defined.
Specifically, when failovermode
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on FailoverMode::NewFeature
also yielding "NewFeature"
.
Explicitly matching on the Unknown
variant should
be avoided for two reasons:
- The inner data
UnknownVariantValue
is opaque, and no further information can be extracted. - It might inadvertently shadow other intended match arms.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
Failover
Merge
Unknown(UnknownVariantValue)
Unknown
. See the docs on this enum for the correct way to handle unknown variants.Unknown
contains new variants that have been added since this code was generated.
Implementations§
source§impl FailoverMode
impl FailoverMode
source§impl FailoverMode
impl FailoverMode
sourcepub fn try_parse(value: &str) -> Result<Self, UnknownVariantError>
pub fn try_parse(value: &str) -> Result<Self, UnknownVariantError>
Parses the enum value while disallowing unknown variants.
Unknown variants will result in an error.
Trait Implementations§
source§impl AsRef<str> for FailoverMode
impl AsRef<str> for FailoverMode
source§impl Clone for FailoverMode
impl Clone for FailoverMode
source§fn clone(&self) -> FailoverMode
fn clone(&self) -> FailoverMode
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for FailoverMode
impl Debug for FailoverMode
source§impl Display for FailoverMode
impl Display for FailoverMode
source§impl From<&str> for FailoverMode
impl From<&str> for FailoverMode
source§impl FromStr for FailoverMode
impl FromStr for FailoverMode
source§impl Hash for FailoverMode
impl Hash for FailoverMode
source§impl Ord for FailoverMode
impl Ord for FailoverMode
source§fn cmp(&self, other: &FailoverMode) -> Ordering
fn cmp(&self, other: &FailoverMode) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
source§impl PartialEq for FailoverMode
impl PartialEq for FailoverMode
source§fn eq(&self, other: &FailoverMode) -> bool
fn eq(&self, other: &FailoverMode) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for FailoverMode
impl PartialOrd for FailoverMode
source§fn partial_cmp(&self, other: &FailoverMode) -> Option<Ordering>
fn partial_cmp(&self, other: &FailoverMode) -> Option<Ordering>
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
self
and other
) and is used by the <=
operator. Read moreimpl Eq for FailoverMode
impl StructuralPartialEq for FailoverMode
Auto Trait Implementations§
impl Freeze for FailoverMode
impl RefUnwindSafe for FailoverMode
impl Send for FailoverMode
impl Sync for FailoverMode
impl Unpin for FailoverMode
impl UnwindSafe for FailoverMode
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
source§impl<Q, K> Comparable<K> for Q
impl<Q, K> Comparable<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read more